Health Observances
Updated April 22, 2024
CDC and partners celebrate health observances each year to honor those working in every corner of the globe to improve vaccine equity and highlight global progress toward a world of healthy people who are protected from vaccine-preventable disease, disability, and death.
Humanly Possible, 2024’s theme, celebrates 50 years of the World Health Organization’s Expanded Program on Immunization (EPI), which began in 1974 to provide universal access to lifesaving vaccines for children worldwide.
On July 28th each year, we join partners to raise awareness about viral hepatitis, which impacts more than 296 million people worldwide.
The world has achieved a 99.9% reduction in wild poliovirus transmission and elimination in 5 of 6 WHO regions, yet persistent challenges remain to end all forms of polio.
More Observances
- Vaccination Week in the AmericasEvery year as part of WIW, more than 40 countries and territories in the Americas come together to raise awareness about the importance of immunization and reach communities with life-saving vaccines.
